Table 1 Severity scale according to Bland [22] that was used to grade nerve conduction measurement results

0

Normal

DML less than 4.1 ms; normal DSL (DSL less than 2.8 ms)

1

Mild

DML < 4.1 ms; slow DSL (2.8 ≤ DSL < 4.1)

2

Moderate

4.1 ≤ DML < 6.5; DSL any value except for conduction block

3

Severe

4.1 ≤ DML < 6.5 ms; DSL conduction block

4

Very severe

6.5 ≤ DML; DSL any value

5

Extremely severe

DML conduction block; DSL conduction block